// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)

#pragma once

#include <ctime>  // std::time_t
#include <spdlog/common.h>

namespace spdlog {
namespace details {
    namespace os {

        SPDLOG_API spdlog::log_clock::time_point now() SPDLOG_NOEXCEPT;

        SPDLOG_API std::tm localtime(const std::time_t& time_tt) SPDLOG_NOEXCEPT;

        SPDLOG_API std::tm localtime() SPDLOG_NOEXCEPT;

        SPDLOG_API std::tm gmtime(const std::time_t& time_tt) SPDLOG_NOEXCEPT;

        SPDLOG_API std::tm gmtime() SPDLOG_NOEXCEPT;

// eol definition
#if !defined(SPDLOG_EOL)
#ifdef _WIN32
#define SPDLOG_EOL "\r\n"
#else
#define SPDLOG_EOL "\n"
#endif
#endif

        SPDLOG_CONSTEXPR static const char* default_eol = SPDLOG_EOL;

// folder separator
#if !defined(SPDLOG_FOLDER_SEPS)
#ifdef _WIN32
#define SPDLOG_FOLDER_SEPS "\\/"
#else
#define SPDLOG_FOLDER_SEPS "/"
#endif
#endif

        SPDLOG_CONSTEXPR static const char folder_seps[] = SPDLOG_FOLDER_SEPS;
        SPDLOG_CONSTEXPR static const filename_t::value_type folder_seps_filename[] = SPDLOG_FILENAME_T(SPDLOG_FOLDER_SEPS);

        // fopen_s on non windows for writing
        SPDLOG_API bool fopen_s(FILE** fp, const filename_t& filename, const filename_t& mode);

        // Remove filename. return 0 on success
        SPDLOG_API int remove(const filename_t& filename) SPDLOG_NOEXCEPT;

        // Remove file if exists. return 0 on success
        // Note: Non atomic (might return failure to delete if concurrently deleted by other process/thread)
        SPDLOG_API int remove_if_exists(const filename_t& filename) SPDLOG_NOEXCEPT;

        SPDLOG_API int rename(const filename_t& filename1, const filename_t& filename2) SPDLOG_NOEXCEPT;

        // Return if file exists.
        SPDLOG_API bool path_exists(const filename_t& filename) SPDLOG_NOEXCEPT;

        // Return file size according to open FILE* object
        SPDLOG_API size_t filesize(FILE* f);

        // Return utc offset in minutes or throw spdlog_ex on failure
        SPDLOG_API int utc_minutes_offset(const std::tm& tm = details::os::localtime());

        // Return current thread id as size_t
        // It exists because the std::this_thread::get_id() is much slower(especially
        // under VS 2013)
        SPDLOG_API size_t _thread_id() SPDLOG_NOEXCEPT;

        // Return current thread id as size_t (from thread local storage)
        SPDLOG_API size_t thread_id() SPDLOG_NOEXCEPT;

        // This is avoid msvc issue in sleep_for that happens if the clock changes.
        // See https://github.com/gabime/spdlog/issues/609
        SPDLOG_API void sleep_for_millis(unsigned int milliseconds) SPDLOG_NOEXCEPT;

        SPDLOG_API std::string filename_to_str(const filename_t& filename);

        SPDLOG_API int pid() SPDLOG_NOEXCEPT;

        // Determine if the terminal supports colors
        // Source: https://github.com/agauniyal/rang/
        SPDLOG_API bool is_color_terminal() SPDLOG_NOEXCEPT;

        // Determine if the terminal attached
        // Source: https://github.com/agauniyal/rang/
        SPDLOG_API bool in_terminal(FILE* file) SPDLOG_NOEXCEPT;

#if (defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)) && defined(_WIN32)
        SPDLOG_API void wstr_to_utf8buf(wstring_view_t wstr, memory_buf_t& target);

        SPDLOG_API void utf8_to_wstrbuf(string_view_t str, wmemory_buf_t& target);
#endif

        // Return directory name from given path or empty string
        // "abc/file" => "abc"
        // "abc/" => "abc"
        // "abc" => ""
        // "abc///" => "abc//"
        SPDLOG_API filename_t dir_name(const filename_t& path);

        // Create a dir from the given path.
        // Return true if succeeded or if this dir already exists.
        SPDLOG_API bool create_dir(const filename_t& path);

        // non thread safe, cross platform getenv/getenv_s
        // return empty string if field not found
        SPDLOG_API std::string getenv(const char* field);

        // Do fsync by FILE objectpointer.
        // Return true on success.
        SPDLOG_API bool fsync(FILE* fp);

    }  // namespace os
}  // namespace details
}  // namespace spdlog

#ifdef SPDLOG_HEADER_ONLY
#include "os-inl.h"
#endif
